Domestic boiler.



No. 733,730. I PATENTED JULY 14, 1903..

v H. A. MILLER. DOMESTIC BOILER.

APPLICATION FILED JAN. 8, 1903.

no MODEL.

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34 INVENTOR. 34 a. fiuzzw ATTORNEY.

UNITED STATES Patented July 14, 1903.

PATENT OFFICE.

HANS A. MILLER, OFCROOKETT, CALIFORNIA.

DOMESTIC BOILER;

SPECIFICATION formingpart of Letters Patent N 0. 733,730, dated J uly 14, 1 903. Application filed January 8,1903. seam). 138,323. (Nomodeh) To on whom it may concern:

Be it known that I, HANS A. MILLER, a citizen of the United States, residing at Crockett,

in the county of Contra Costa and State of California, have invented certain new and useful Improvements in Domestic Boilers, of which the following is a specification.

My invention relates to improvements in domestic boilers, the object of my invention being to provide a boiler for use in connection with domestic stoves or ranges which will economize the heat of the stove and which will not interfere with the action'of the oven.

Water-backs as commonly used in stoves and ranges always reduce the baking ability of the stove to a greater or less degree, and in some cases the reduction is so great as to render the stoveuseless for baking purposes.

It is the object of my invention to provide a boiler which will be free from these objections. 2

My invention therefore resides inthenovel construction, combination, and arrangement of parts for the above ends hereinafter fully specified and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a side elevation of a stove and a domestic boiler used in connection therewith constructed in accordance with my invention. Fig. 2 is a vertical section of the boiler on a larger scale. Fig. 3 is a cross-section thereof on the line A A of Fig. 2. Fig. 4 is a perspective view of one of the heads or castings. Fig. 5 is a front view of the upper portion of the boiler. Fig. 6 is a plan view of one of the heads or castings.

Referring to the drawings, 1 represents a domestic stove, and 2 the stovepipe leading therefrom. V

3 represents the boiler, which comprises an external cylindrical casing 4, an internal cylindrical casing or wall 5, and upper and lower heads 6 and 7. Said heads are riveted to said casings, as shown at 8. The internal casing or wall 5 is placed eccentric to the external casing 4 and forms a continuation of the fiue of the, stove. The object of thus placing the 1 together by a bolt 16 and nut 17.

20,1eading to the chimney.

veniently support the boiler upon the stand for the same. Said stand is shown at 9, and comprises a foot 10, a stem 11, arms 12, forming a fork, and a ring 13, supported upon the upper ends of said arms. In this ring 13 the lower edge of the boiler is seated in the usual respectively, above and below the upper and lower edges of the internal wall or. casing. The head 15, the ribs 18, and the sleeve 19 are all made in one casting, as shown in Fig. l.

Asbestos gaskets 22 are placed between said edges and the annular flanges 21, but these gaskets may be omitted, if desired. In the upper sleeve is journaled a rod 24, carrying a damper 25, said damper being operated by means of a lever 26, carrying a weight 27 on the arm and having attached to its other arm a chain 28, which may be hooked to a hook 29,

located at any convenient place for the pur- The.

pose of holding. the damper closed. weight when the chain is'released restores the damper to its open' position. The cold water enters at the top by means of the pipe 30, which is continued down to the bottom of the boiler by means of a pipe'Sl, and the hot water is drawn'off from'the boiler by means of the pipeSS. At 34' is secured a shortpipe,

with a faucet for the purpose of drawing off the water from the boiler when desired. The cold-waterpipe is perforated near the top, as shown at 36. This prevents the water being siphoned to any considerable extent out of the boiler if the water should be drawn offfrom the watersupply system, as is sometimes necessary.

In operation the products of combustion pass upward through the flue 2 and the lower sleeve 19 and are then spread outward by the spreader-tube 14, heating the inner wall of the loo boiler. They then pass upward inside the upper sleeve 19 and are carriedout by means of the elbow 20.

To clean the flue inside the boiler, first remove the stovcpipe 2, which can be done by slightly raising it to lift it above the usual rimcast on the stove-top and then tilting it to one side and lowering it, then place a bucket or other suitable receptacle for the soot underneath the lower sleeve, then remove the elbow 20 from the top of the boiler and insert a stick or any convenient implement and displace the soot, which will fall into the receptacle provided. There being substantially no obstruction to the fall of the soot, the inner wall of the boiler is easily cleaned.

Since the products of combustion are utilized to heat water after they have been passed around the oven, the baking ability of the stove is in no way diminished by the addition of the boiler. The arrangement of the boiler eccentric to the .flue also enables it to be added without being cumbersome or in the way of persons using the stove. It will be observed that the supports for the boiler are on a plane to one side of the center of the boiler. This plane is, however, substantially beneath its center of gravity when filled with water. The insertion of the spreader-tube within the inner wall of the boiler causes the products of combustion to spread, so that the heating-surface is larger than that of the ordinary waterback of a stove. The cost of the apparatus compares favorably with the cost of the ordinary domestic boiler and the water-back combined, which it displaces. A further advantage is that the exterior wall of the boiler is less exposed to loss of heat by radiation, being in a position to be warmed by the hot air ascending from the stove; also, that the whole apparatus takes up less room than that occupied by the stove and domestic boiler as at presentconstructed; also, that the apparatus can be set up by an ordinary householder without having to call in a plumber, since the diflicult fitting-in of the water-back and mak ing connections between the water-back and the boiler is not now needed.

I claim- 1. The domestic boiler comprising the outer and inner walls, the upper and lower heads connected with the two walls, the spreadertube within the inner wall closed against the passage of gases therethrough, the lower easting having a sleeve to engage the upper end of the lower stovepipe and having a flange to engage the lower end of the inner wall of the boiler, the upper casting having a sleeve to engage the lower end of the upper stovepipe and having a flange to engage the upper end of the inner wall of the boiler, and means for securing said castings upon said boiler, substantially as described.

2. The domestic boiler comprising the outer and inner walls, upper and lower heads connected with the two walls, means for making tight joints between the ends of the inner wall and the ends of the stovepipes connected therewith, each means having also formed integral therewith a head or plate, a spreadertube within said wall between said heads or plates, and inlet and outlet pipes for said boiler, substantially as described.

The domestic boiler comprising the outer and inner walls, upper and lower heads connected with the two walls, means for making tight joints between the ends of the inner wall and the ends of the stovepipes connected therewith, each means comprising inwardlyextending ribs, and a head or plate supported by said ribs, a spreader-tube within the inner wall having its ends closed by said heads or plates, a bolt through said heads or plates clamping the tube therebetween, and inlet and outlet pipes for said boiler, substantially as described.

4. The domestic boiler-comprising the outer and inner walls, eccentric to each other, the upper and lower heads connected with the two walls, the spreader-tube within the inner wall closed against the passage of gases therethrough, the lower casting having a sleeve to engage the upper end of the lower stovepipc and having a flange to engage the lower end of the inner wall of the boiler, the upper casting having a sleeve to engage the lower end of the upper stovepipe and having a flange to engage the upper end of the inner wall of the boiler, and means for securing said castings upon said boiler, substantially as described.

5. A domestic boiler comprising outer and inner walls, eccentric to each other, upper and lower heads connected with the two walls, a spreader-tube within the inner Wall closed against the passage of gases therethrough, means for making tight joints between the ends of the inner wall of the cylinder and the ends of the stovepipes connecting therewith, and inlet and outlet pipes for said boiler, substantially as described.

6. The domestic boilercomprising the outer and inner walls, eccentric to each other, upper and lower heads connected with the two walls, means for making tight joints between the ends of the inner wall and the ends of the stovepipes connected therewith, each means having also formed integral therewith a head or plate, a spreader-tube within said tube between said heads or plates, and inlet and outlet pipes i'or said boiler, substantially as described.

and inner walls, eccentric to each other, upper and lower heads connected with the two walls, means for making tight joints between the ends of the inner wall and the ends of the stovepipes connected therewith, each means 7. Thedomesticboilercomprisingthe outer comprising inwardlyextending ribs, and a In witness whereof I have hereunto set my head or plate supported by said ribs, a spreadhand in the presence of two subscribing Witer-tube Within the inner wall having its ends nesses.

closed by said heads or plates, a bolt through HANS A. MILLER. 5 said heads 01' plates clamping the tube there- Vit'nesses:

between, and inlet and outlet pipes for said F. M. WRIGHT,

boiler, substantially as described. BESSIE GORFINKEL. 

